Which of the following is NOT listed as an aircraft ammunition type?

• A. Armor-Piercing Non-Explosive (APNE)
• B. Ball
• C. Tracer
• D. API

Answer: (A)

When evaluating aircraft ammunition, you’re looking at how the round is intended to perform in flight and on target. Ball rounds are the basic, non-specialized projectiles used for general purposes and training. Tracer rounds add a burning element that makes the flight path visible, helping the shooter adjust aim, especially at range. Armor-Piercing Incendiary (API) rounds are designed to penetrate armor and ignite the target, a common combination in many aircraft calibers.

Armor-Piercing Non-Explosive would imply a round that pierces armor without any explosive or incendiary effect. In typical aircraft ammunition catalogs, there isn’t a standard category for non-explosive armor-piercing rounds because the practical effects needed in air-to-ground or air-to-air engagements usually rely on some form of payload (incendiary, explosive, or tracer) or at least visibility of the round’s path. Since APNE isn’t a standard, widely listed type for aircraft ammunition, it’s the one that isn’t listed among common types. The other three—Ball, Tracer, and API—are standard, well-established categories.